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Kinetic Energy

the ratio of ...

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the ratio of kinetic energy of a planet at perigee and apogee during its motion around the sun in elliptical orbit of eccentricity e is

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Q. The ratio of kinetic energy of a planet at perihelion and aphelion during its motion around the sun in elliptical orbit of eccentricity

e

Q. A planet revolves around the sun in an elliptical orbit. If

v_{p}

v_{a}

are the velocities of the planet at the perigee and apogee respectively, then the eccentricity of elliptical orbit is given by :

Q. In elliptical orbit of a planet, as the planet moves from apogee position to perigee position.

Column-I	Column-II
(a) speed of planet	(p) remains same
(b) distance of planet from centre of sun	(q) decreases
(c) potential energy	(r) increases
(d) angular momentum about centre of sun	(s) can not say

Q. A planet is revolving round the sun. Its distance from the sun at Apogee is

r_{A}

and that at Perigee is

r_{P}

. The masses of planet and sun are

m

M

v_{A}

is the velocity of planet at Apogee and

v_{P}

is at Perigee respectively and

T

is the time period of revolution of planet round the sun, then identify the wrong answer.

Q. The figure shows a planet in an elliptical orbit around the sun S. At which position of the planet will its kinetic energy be maximum?

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